Present status of the determination of the constant of total radiation from a black body
This is a continuation of former papers, and consists of (1) an historical summary of the principal determinations up to the present of the value of the constant, sigma , of total radiation; (3) a new determination of by a method in which accurate corrections are made for lack of "blackness" of the radiator, for losses by reflections for variation of thickness of lampblack layer, and for atmospheric absorption. It is demonstrated that the presence of aqueous vapour in unmeasured quantity is fatal to a correct measurement. The method employed is that of a modified A ngstrom pyrheliometer, where the heat received radiometricaUy is compensated electrically. The temperature of the radiat
Volume Bulletin of the Bureau of Standards, Vol. 12, 553-582 (1916) Scientific Paper 262 (S262)
Publisher National Bureau of Standards
Possible copyright status The Bulletin of the Bureau of Standards is a publication of the U.S. Government. The papers are in the public domain and are not subject to copyright in the United States. However, please pay special attention to the individual works to make sure there are no copyright restrictions indicated. Individual works may require securing other permissions from the original copyright holder.
Digitizing sponsor NIST Research Library
Book contributor NIST Research Library
Collection NBSBulletin; NISTresearchlibrary; fedlink; americana